By Guy Faulconbridge and Vladimir Soldatkin MOSCOW (Reuters) -Russia is willing to work with Donald Trump's incoming administration to improve relations if the U.S. has serious intentions to do so but it is up to Washington to make the first move,

Eugene Spector was already serving a sentence for a bribery conviction when he was charged with spying, for which a court ordered him to serve an additional 13 years.

Russian President Vladimir Putin on Thursday suggested a missile 'duel' with the United States that would show how Russia's new Oreshnik hypersonic ballistic missile could defeat any U.S. missile defence system.

Russia has warned its citizens to not visit the US since relations with Washington are confrontational, claiming that they could risk being "hunted" by American authorities.

Russia now views arms control over the vast nuclear arsenals that were built up during the Cold War to be a thing of the past due to the lack of trust between Moscow and the West, Russia's top general said on Wednesday.

Russia is keen to disrupt, weaken or even divide NATO and one way of encouraging that might be to convince the U.S. that war is coming with the alliance in Europe and to ask America if it wants to be dragged into it. This especially matters as Trump's incoming administration forms its policies toward NATO and Russia.

The global repercussions of Russia’s attack on Ukraine are subverting the foundations of the international nuclear order

Eugene Spector, who was already serving a 3½-year sentence in Russia for bribery, received the additional sentence after being charged with espionage last year.

Ukrainian President Volodymyr Zelensky confirmed Monday more than 3,000 troops from North Korea have been killed so far fighting next to Russian forces.

Russia is willing to work with Donald Trump's incoming administration to improve relations if the US has serious intentions to do so but it is up to Washington to make the first move, Foreign Minister Sergei Lavrov has said.

Amid the ongoing Russia-Ukraine war, tensions between the military alliance, which supports Kyiv in its defense efforts, and the Kremlin have continued.